Hand punch and the like



Sept. 25, 1928. 1,685,604

J. JENSEN HAND PUNQH AND THE LIKE Fil ed Nov. 27, 1925 'IIIII'II; Ill

wm Joim/ 11522051 4 Patented Sept. 25, 1928.

UNITED STATES PATENT OFFICE...

JOHN JENSEN, 0F ROCKFORD, ILLINOIS, ASSIGNOB TO WHITNEY METAL TOOL GOM- PANY, OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

HAND PUNCH AND THE LIKE.

Application fi1ed November fering with the operation of the tool by means of the relatively swinging hand levers.

Briefly stated I attain these objects together with other and ancillary advantages by employing a link and lever connection between the punch orot-her workingtool and one of the operating levers, said connection including a pivoted member fulcrumed between its ends on the head of the tool and having one end operatively associated with the operating lever by a toggle linkage such that the power applied to the operating lever is greatlymultiplied in its transmission to the working tool.

Figure 1 of the drawings is a side elevational view of a hand punch.

Fig. 2 is a plan view of the same.

Fig. 3 is a fragmentary vertical elevatioual section on an enlarged scale.

Fig. 1 is an end view of the same.

Fig. is a similar view showing the invention applied to a riveter.

Vhile I have herein shown my invention in its preferred form, it is contemplated that various changes may be made in the construction and arrangement set forth without departing from the spirit and scope of the invention as expressed in the appended claim.

The tool comprises a head 7 bifurcated at its forward end to form two jaws 8 and 9 spaced apart vertically. Rigid with and extending rearwardly from thehead 7 is an arm 10 having a handle 11 at its free end. An operating lever 12, having a handle 13 at the rear end, is fulcrumed at its forward end upon a pivot bolt 14: mounted in a pair of upstanding laterally spaced ears'15 rising from the rear end of the head 7, the bolt being screw-threaded into one of the ears. Rigid with the forward end of the leverl and preferably formed integral 27, 1925. Serial No. 71,518.

therewith is an arm 16 extending upwardly and slightly forwardly, and pivota'lly connected' to the upper end of this arm lo. means of a link 17 is a lever 18. For this purpose the arm 16 carries a pivot pin 19 and the rear end of the lever 18 is bifurcated to receive the upper end of the link 17. the latter being connected to. the lever by means of a pivot bolt 20 screw-threaded into one side of the bifurcated 'ortion of thelever. Between its ends the ever 18 is fuh-rumed on a pivot bolt 21 mounted in a pair of laterally spaced ears 22 rising from the head 7 at a point spaced slightlyrearwardly from its forward end, the pivot'bolt 21 being screw-threaded into one of said ears.

The forward end of the lever 18 operatively engages the upper end of a working tool, which in the case of Figs. 1 to 4 is in the form of a punch 23 vertically slidable inthe forward end of the upper jaw 9 on the head 7. Herein I have shown the forward end of the lever as being constructed on its underside to form an under-cut- T-slot 24 (Fig. i) and the punching tool 23 has a T-shaped head slidably engaging in said slot. The arrangement is such as to permit the up and down movement of the punch 23 and the swinging movement of the lever 18; and the T-slot being open at its forward end permits the two parts to be moved into interengaging relation before the lever ,18 is mounted in position.

The lower jaw 8 carries a coacting tool or die 26 mounted in a vertical screw-threaded aperture in the jaw 8, the die being, of course. axially apert-ured to receive the lower end of the punching tool 23. For convenience in inserting the die its lower end may be extended and provided with akerf 27 for the reception of a screw driver bit.

It will be apparent that the arm 16 and link 17 forming the connection between the levers 12 and 18 constitutes in effect 'a toggle linkage by means of which power applied to the lever 12 to swing it toward the arm 10 is greatly multiplied and hence effectually transmitted through the lever 18 to the working tool 23. Atthe same time, the fulcrum of the lever 12 is located a substantial distance rearwardly from the front end of the tool proper so that the operation of the lever in a direction away from the arm v10 to withdraw the working too] from lit) the die may be accomplished without interference in cases where the punch must be inserted into relatively limited spaces.

By reason of the great multiplication of power by the toggle linkage provided, the tool is especially adapted for use in performing not only hea'vy punching operations but also rivetingoperations. In the latter case, of course, the working tool employed is of a suitable character, being shown in -Fig. at in the form ojta solid cylindrical member 28 constituting a rivet set which is slidable in the upper jaw 9, and in the lower jaw 8 a similar coacting tool member 29 is adj ustably mounted.

The construction employed is relatively simple and yeteflectual in operation, and is particularly advantageous because it permits the insertion of the forward end or head of the tool into relatively small spaces without interference with the operation thereofby means of the swinging hand lever.

, I claim as my invention:

A tool of the class described comprising an arm having an enlarged bifurcated head at one end, a working tool mounted m one of said bifurcationsfor sliding movement toward and from the other of said bifurcations, a pair otsupports rigid with and spaced longitudinally along one side of said head, a working lever pivoted-on the forward one of said supports and having one end engaging said tool for actuation thereof with the opposite end substantially overl ing the other support, a hell crank lever pivoted on the rear one of said supports, and a link pivotally connecting the rear end of said working lever and the forward end of said bell crank lever effecting a toggle joint therebetween, the p1votal points of SQKlJOlllil bein substantiall alined at the end of the JOHN JENSEN. 

